1921 



INDEX 



61 



Pages (S< Plates 



Masckeites 21, Cl.ll 



densus 



Measurement 1 1 



Megalomorph 6 



— , Proplanulites 34 



metorchum ccliv 



micans cclv 



Microceras densinodum clxxviii 



Micromorph 6 



Milborne Beds 43, 51 



Minchinhampton Beds . . . . 51 



— Shelly Beds 43 



Morphoceras 22 



— pseudo-anceps clxxiii, clxxiv 



Morphoceratan 28 



Morphoceratid (defrancii) . . . . 30 

 Morphology, Cadoceratidae . . 21 



morrisi , 40 



Morrisiceras . . . . 22, 43, 47, 49, 



51, ci.xvii 



comma, homo3oticum, 



korustes, sknipum, 



sphaera, tolmerum 

 Morrisites . . . . 43, 48, 49, 51 



fornicatus, morrisi 

 Mouth CCLXIV 



— re-opened clxxiv 



— , see Aperture 



murleyi ccxvi 



Murleyiceras . . . . ccxvi, ct xlv 



forte, murleyi 



Nannoids 6 



Natural Order 14 



Nautilus ammonoides . . cxxxn a, b 

 Xeumayriceras ccxxiv 



oculatum 



nodatus ccxlii 



Node on auricle cxl 



nodulatum ccxxii 



Nomomorph 6 



Normannites 6, 21 



numismalis ccxxxm 



obliquatum ccxxxiv 



obtusicosta 42 



Obtusicostites 33, 42 



dhosaensis, obtusicosta, 



omphalodes, paramorphus 



occultus 35 



ocellatum 23, clxxiii 



Ochraceous Lias cxlvii 



Ocular aperture and parabolae . . 31 



oculatum ccxxiv 



(Ecoptychius 24 



refractus 

 (Ecoptychius grossouvrei 7, clxxvi 



— refractus 7 



— , sphaerocone stage . . clxxv 

 (Ecoptychoceras . . . . 24, clxxv, 



clxxvi 

 grossouvrei, subrefractum 



CEcostephanus cclxv 



dolichcecus 

 Oecotraustes genicularis . . . . 25 



Oekotraustes 25 



oidaleus 38 



omphalodes 42 



omphaloides 18, cxcv 



Pages fi- Plates 

 opimus 35 



— horizon 40 



Oppelia 25 



waageni 



Oppelia subradiata 25 



Oppelid, acmic clxxvii 



— , ellipticone . . clxxxix 



Oppelidae 24 



ordinarium CLXX1 



ornate venter 53 



Ornati 53 



otiophora cxci 



Otoites 6, 7, 9, 12, 22. 



CXLI, CLVIII 



contractus, delicatus 



Otoitidae 22 



Oxford Clay Strata 10 



oxygastric 13 



Oxynotes 13 



Oxynoticeras. . .. 6, CXX.III, cxlv 



buckii, oxynotum 

 Oxynoticeras, and nat. order 14 



— flavum ,, ,, ,, 6, 55 



— oxynotum clxv 



oxynotum cxliii 



Pachammatoceras . . . . ccvn 



pachu 



pachu ccvn 



Pachyceratidae 21, 43 



Palingenesis 11 



Paltopleuroceras cxlix 



buckmanii 



papillatum cl 



Papilliceras cl, ccv 



acantherum, papillatum 

 Parabolae, and ocular aperture . . 31 



parabolic curve 12, 28 



Paralectotype . . . . cclxi b 



paramorphus 42 



Parinodiceras 13 



Parkinsonia 29 



— caumontii . . clxiii, cxlix, 



ccxlii 



— haugi 29 



— neuffensis ccin 



Parkinsonian 28 



— venter 29, 53 



Parkinsonidas 28, 53 



partitus 39 



partschi ccxlvi 



Pavloviceras 18, 21, clxx, 



cxcv, cxcvi, cxcvii 

 bathyomphalum, omphaloides, 

 pavlowi, roberti, stibarum 

 pavlowi (-ovi) 18, 19, 55, clxx 



Pelecoceras ccxxxiv 



obliquatum 

 Peltoceras arduennense horizon, . . 10 



pendambilianum 43 



perexpansum . . . . 6, cxxxiv 



perfoliatum . . . . 7, 14, cxxxvn 

 Perisphinctean forms, from different 



lines 28 



— venter 29 



Perisphinctes 26, 27 



biplex, martelli 



